MSefi.com read only forum (Jan.15,2018)

Pretty sure I already know the answer to my question but figured I'd go ahead and ask anyway.

I had a dumb behind attack and ran my engine with the o2 sensor un-powered for a total of about 30 minutes. Now I'm getting readings that seem different than before like; rich under deceleration, lean under acceleration, lean under wot, etc...

Is my sensor toast?

I'm not currently controlling anything just data logging how the current carburetor behaves.

Thanks,
Andrew

What wideband O2 are you using? Is it possible you may require a free air calibration to be performed like some of Innovate WB controllers. I would unplug the controller and O2 sensor...let the engine sit for a while to clear out the exhaust fumes and reinstall. just a thought!

chris

I don't think leaving an WB O2 sensor unplugged for 1/2 hour will kill the sensor. but then again.....

boosted 89 wrote:What wideband O2 are you using? Is it possible you may require a free air calibration to be performed like some of Innovate WB controllers. I would unplug the controller and O2 sensor...let the engine sit for a while to clear out the exhaust fumes and reinstall. just a thought!

chris

I don't think leaving an WB O2 sensor unplugged for 1/2 hour will kill the sensor. but then again.....

I'm using an Innovate LC-1.
I calibrated it per the manual when I installed it and did an open air calibration today.

In open air it reads 22.something and in a gas soaked rag it reads 7.something. But response seams slow.

I've been looking around and found something about the heater having to be on while the engine is running to burn off carbon so it doesn't build up in the sensors "pump."

I went ahead and ordered another one from DIYAutoTune so it should be here by the end of the week. Oh well live and learn.

"dumb behind attack" haha.
Just noticed the board automatically edits some words, looks like my grandmother wrote that.

Just one man's opinion mind you - but I wouldn't use a gas soaked rag! I think you risk contaminating the sensor.

I use a cigarette lighter (UN-LIT OF COURSE) to test my sensor which seems to work quite well.

Ken

How do you use a cig lighter to test? (just curious )

kjones6039 wrote:Just one man's opinion mind you - but I wouldn't use a gas soaked rag! I think you risk contaminating the sensor.

I use a cigarette lighter (UN-LIT OF COURSE) to test my sensor which seems to work quite well.

Ken

Good idea, thanks for the tip. Much cleaner and no lingering gas smell on your hands.

HidRo wrote:How do you use a cig lighter to test? (just curious )

Push the valve button on the lighter so it sprays butane vapour at the sensor, which then declares, "Holy cow - I'm surrounded by unburned hydrocarbon!" Zippo types and self-auto-lighting types don't work for this, of course...

Nice method!!!!
Always learning!